wayland: Ensure that the maximum libdecor frame size limit is above the required minimum

Both the minimum and maximum libdecor frame size limits must meet or exceed the required minimum size, or the libdecor plugins can error and/or crash.

src/video/wayland/SDL_waylandwindow.c

@@ -191,8 +191,8 @@ static void SetMinMaxDimensions(SDL_Window *window)
     } else if (window->flags & SDL_WINDOW_RESIZABLE) {
         min_width = SDL_max(window->min_w, wind->system_min_required_width);
         min_height = SDL_max(window->min_h, wind->system_min_required_height);
-        max_width = window->max_w;
-        max_height = window->max_h;
+        max_width = SDL_max(window->max_w, wind->system_min_required_width);
+        max_height = SDL_max(window->max_h, wind->system_min_required_height);
     } else {
         min_width = wind->wl_window_width;
         min_height = wind->wl_window_height;